Interchangeable artificial tooth.



INT

NATION FILED 00126, 1912.

Patented Dec. 1%, 1913.

lltril [lli b'lr, kl 1 INVENTUR monkeys -UNITED sir JAMES W. IVORY, 03E PHILADELPHIA, fENNSYLVANIA.

INTERCHANGEABLE ARTIFICIAL TOOTH.

' Speciflpation of Letters Katent.

Patented Dec. to, lllldfil.

Application filed llctober 26, 1912. Elerial No. 727,834..

To all whom it may concern Be it known that I, JAMES W. lvoRY, a subject of the King of Great Britain, residing in the city and county of Philadeh phia, State of Pennsylvania, have invented a new and useful Interchangeable Artificial -'lootl1, of which the following is a speciand consequently with a bridge or other work, as will be hereinafter set forth.

The invention is satisfactorily illustrated in the accompanying drawing, but the important instrmnentalities thereof may be varied, andso it is to be understood that the invention is not limited to the specific arrangement and organization shown and described,

Figure 1 represents a perspective view of an artificial tooth with ananchor thereon embodying my invention. Fig. 2 represents a perspective view of the facing plate employed. Fig. 3 represents a perspective view of another embodiment of my invention. Fig. 4 represents a horizontal section thereof on line 00-a:, Fig. 8. Fig. 5 represents a perspective view of the tooth having,

the facing plate partially applied thereto. Figs. 6, 8 and 10 represent rear elevations of a tooth as other embodiments of my invention. Fig. 7 represents a horizontal. sec tion on line 3 i Fig. 6. Fig. 9 repre a horizontal section on line 2-e Fig. 8. Fig. 11 represents a horizontal section. on line aa Fig. 10. Fig. 12 represents an elevation of another embodiment of the facingplate. Fig. 13 represents a horizontal section thereof on line b-b Fig. 19. Fig. 14 represents an elevation of another embodiment of the invention. Fig. 1.5 represents a vertical section on line (.2 c "Fig. 14".. Fig. 16 represents a horizontal section on line cZr.Z Fig. 14. Fig. 17 represents a section of another embodiment.

Similar numerals of reference indicate correspondingparts in the figures.

Referring to the drawings, 1 designates an artificial tooth or crown which excepting the feature of my invention applied thereto is of usual order. On. the sides of the tooth are the recesses 52 which are adapted sents for the attachment to said tooth or crown of a backing for the same, said backing consisting of a plate 3 of metal which with the tooth or crown has iote'rengagcable 211313111 tenances for connectionwith each other. as, WllllJB hereinafter described. Attached dh rectly to the tooth is an anchor on anchor plate 13 see Fig. 1, which consists of a piece of metal bent on itself forming the outturned lips 4 and inward dellcctions finining the limbs 5 which are embedded in tooth or crown and thus retained firmly therein. The anchor plate is made of platinum which will enoure the high heat to which itwill be subjected in the porcelain furnace.

To the plate 3 are secured in any able manner see Fig. 2, the longitudinally extending lips 6 which are intro-tied, and i adapted to be presented to the lips t as shown in Fig. 5 and by longitudinal movements of either tooth or plate, causing he engagement of the plate with the tooth in :1 than and reliable manner, while the gual side of the tooth is completely covered by said plate forming a smooth plain sun face so as to prevent the possibility of solder or other substance reaching the porcelain or material of the tooth or crown, while the operator is forming a bridge and obtain free action in the connection of the tooth. with av bridge or other work.

l't will be noticed. that. the rcce s a are set in from the lateral terminals or .n: i 4 so as to provide spaces for the inturne lips ll of the backing plate 3, and thus cause said plate to lie Hat on the baclr of the tooth and consequently even therewith.

.lln lFigv 3, l show the ends of lips of mean hers 6 separate from each other in the iongitudinal direction of the plate, said ends being secured to the plate by riveting, heading or other suitable means, sec l g. l.

In Figs. 6 and 3'". the anchor plate i. itastoned. to the tooth or crown by the pins '2' which are placed in horizontal direction and passed. through said anchor plate into the tooth or crown.

In Figs. 8 and 9, the anchor plate 13 is yes fastened to the tooth or crown by the pins 8 which are placed in vertical Jmsition and passed through said anchor plate into the tooth or crown.

In Figs. 10 and ll, the anchor plate 1m constructed of a piece of metal bent on itself to form the narrow outturned lips 4, and

the limbs 5, both of somewhat dovetailed form.

in Figs. 12 and l3,'the inturned lips 6 are formed on a plate?) which is attached to the backing 3 by the pins 10, saidplate being 'set in a depression in said backing said of the backing plate to be applied thereto.

- In said Figs. 14, Hand 16 the anchor plate as in all other cases is embedded the thick' ness of its metal into the body of the tooth,

' the limbs on the edges of said plate also penetrating said body. This with the pins employed make a strong and reliable attachment for said plate with the material.

Fig. 17 shows an anchor which is composed of a plate 13 folded on itself to form the side lips i and the legs 5 which are spread apart and embedded in the tooth and baked therein forming a strong connection for the anchor. In this figure the tooth is provided with recesses 2 for the lips of the backing plate as in the previous instances.

I The pins 7 and 8 may be formed of platinum as has been stated of the anchor plate, but if desired, the latter may bemade of less expensive metal and secured to the tooth by platinum attachments in the latter, said plate being brazed to said attachments.

- The operation is as follows: The backing plate is soldered to a bridge or other denture, and reinforced on the back thereof.

The tooth is then applied to said plate and the lips 6 of the latter engaged with the lips 4 of the anchor and fitted in position and cemented, the gold on the biting edge of the tooth being burnished. In the event of fracture, a tooth may be removed, and another tooth substituted therefor, ,fitted and secured without destroying or affecting the other parts of the bridge or denture as adjusted to the mouth. In case of a'crown, a pin is soldered to the upturned part of the backing plate, as shown in dotted lines, whereby. the dentist is enabled to use .this style of an attachment in adjusting the same.

Attention is directed to the fact that the anchor plate in the main is embedded in the tooth the thickness of its metal, and thus said plate .is onan even plane with this surface of the porcelain of the tooth, whereby as the lips of the back plate engage the lips of the anchor plate, the backing plate will slide evenly over the uncovered portions of the lingual face-of the tooth, while the backing plate as constrncted, will prevent solder from reaching the tooth or obstructing the free union of the anchor plate therewith.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

l. inv an artificial tooth, an anchor plate having free edges forming lips engaging and overhanging recesses in the body of the tooth, and means extending in opposite directions from a backing to engage the free edges of the anchor plate.

- 2. In an artificial tooth, a backing plate the anchor plate and adapted for the lingual side of the tooth,

and an embedded anchor plate on the tooth flush therewith and projecting upon opposite sides, said anchor and backing plates being provided with engaging means for,

firm connection thereof and admitting of said plates being seated even with the surface of the tooth.

3. An artificial tooth having an embedded anchor plate flush thereon with portions projecting upon opposite sides, and a removable backing plate for the lingual side of the tooth, said backing, plate and anchor plate having engaging members and the tooth provided with recesses for the engaging members of said backing plate, and the free edges of said anchor plate therein.

4. In an artificial tooth, a backing plate for the lingual side thereof, said plate having inturned lips thereon,'and an anchor plate fixed on said tooth,-said anchor plate havingoutturned lips extending in opposite directions, said lips of the anchor and backing plates being engageable, and said tooth having recesses therein adapted for the reception of the lips of the backing plate and the projection of the free edges of the anchor plate.

5. An artificial tooth-having recesses on the side thereof, a backing and an anchoring plate having outturned lips and inward deflections embedded in the recesses of the tooth, said recesses being set in from the lateral terminals of said lips and providing space for the inturned lips of the backing plate.

-T. W. IVORY. Witnesses: JOHN A. WIEDERSHEIM, N. BUSSINGER. 

